CVE-2021-26731 spx_restservice modifyUserb_func Command Injection and Multiple Stack-Based Buffer Overflows
An authenticated attacker can execute arbitrary code with root privileges via command injection and buffer overflows in the Lanner IAC-AST2500A firmware.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2021-26731?
CVE-2021-26731 is a critical command injection vulnerability in Lanner Inc IAC-AST2500A, published on 24 Oct 2022. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Command injection and multiple stack-based buffer overflows vulnerabilities in the modifyUserb_func function of spx_restservice allow an authenticated attacker to execute arbitrary code with the same privileges as the server user (root). This issue affects: Lanner Inc IAC-AST2500A standard firmware version 1.10.0.
Which versions are affected by CVE-2021-26731?
It affects 1 product.
Products include Lannerinc Iac-Ast2500a Firmware.
How do I fix CVE-2021-26731?
No fix has been published for CVE-2021-26731 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2021-26731 being exploited?
There is no known exploitation of CVE-2021-26731 in the wild and no public exploit code.
Other vulnerabilities in Lanner Inc IAC-AST2500A
- CVE-2021-26727 spx_restservice SubNet_handler_func Multiple Command Injections and Stack-Based Buffer Overflows
- CVE-2021-26728 spx_restservice KillDupUsr_func Command Injection and Stack-Based Buffer Overflow
- CVE-2021-26729 spx_restservice Login_handler_func Command Injection and Multiple Stack-Based Buffer Overflows
- CVE-2021-26730 spx_restservice Login_handler_func Subfunction Stack-Based Buffer Overflow
- CVE-2021-26732 spx_restservice First_network_func Broken Access Control
Sources
Also known as GHSA-9wgq-fhm2-pjf3.